Proposed Maximum Residue Limit PMRL2020-19, Propamocarb hydrochloride

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Pest Management Regulatory Agency
4 August 2020
ISSN: 1925-0843 (PDF version)
Catalogue number: H113-24/2020-19E-PDF (PDF version)

Under the authority of the Pest Control Products Act, Health Canada's Pest Management Regulatory Agency (PMRA) has concluded that the addition of a new use on spinach to the product label of Tattoo Fungicide, containing technical grade propamocarb hydrochloride, is acceptable. The specific uses approved in Canada are detailed on the label of Tattoo Fungicide, Pest Control Products Act Registration Number 29554.

The evaluation of this propamocarb hydrochloride application indicated that the end-use product has value and the human health and environmental risks associated with the new use are acceptable.

Before registering a pesticide for food use in Canada, the PMRA must determine the quantity of residues that are likely to remain in or on the food when the pesticide is used according to label directions and that such residues will not be a concern to human health. This quantity is then legally established as a maximum residue limit (MRL). An MRL applies to the identified raw agricultural food commodity as well as to any processed food product that contains it, except where separate MRLs are specified for the raw agricultural commodity and a processed product made from it.

Consultation on the proposed MRL for propamocarb hydrochloride is being conducted via this document (see Next Steps). A summary of the field trial data used to support the proposed MRL can be found in Appendix I.

To comply with Canada's international trade obligations, consultation on the proposed MRL is also being conducted internationally by notifying the World Trade Organization, as coordinated by the Canada's Notification Authority and Enquiry Point.

The proposed MRL, to be added to the MRLs already established for propamocarb hydrochloride, is as follows.

Table 1 Proposed maximum residue limit for propamocarb hydrochloride
Common Name Residue Definition MRL (ppm)Footnote 1 Food Commodity
Propamocarb hydrochloride propyl N-[3-(dimethylamino)propyl]carbamate hydrochloride (1:1) 150 Spinach

MRLs established in Canada may be found using the Maximum Residue Limit Database on the Maximum Residue Limits for Pesticides webpage. The database allows users to search for established MRLs, regulated under the Pest Control Products Act, both for pesticides or for food commodities.

International situation and trade implications

MRLs may vary from one country to another for a number of reasons, including differences in pesticide use patterns and the locations of the crop field trials used to generate residue chemistry data.

The MRL proposed for propamocarb hydrochloride in Canada is the same as the corresponding American tolerance as listed in the Electronic Code of Federal Regulations, 40 CFR Part 180, by pesticide. A listing of established Codex MRLsFootnote 1 is available on the Codex Alimentarius Pesticide Index webpage, by pesticide or commodity.

Table 2 compares the MRL proposed for propamocarb hydrochloride in Canada with the corresponding American tolerance and Codex MRL.

Table 2 Comparison of Canadian MRL, American tolerance and codex MRL (where different)
Food Commodity Canadian MRL (ppm) American Tolerance (ppm) Codex MRL (ppm)
Spinach 150 150 40

Next steps

The PMRA invites the public to submit written comments on the proposed MRL for propamocarb hydrochloride up to 75 days from the date of publication of this document. Please forward your comments to Publications. The PMRA will consider all comments received before making a final decision on the proposed MRL. Comments received will be addressed in a separate document linked to this PMRL. The established MRL will be legally in effect as of the date that it is entered into the Maximum Residue Limit Database.

Appendix I

Summary of field trial data used to support the proposed maximum residue limit

Residue data for propamocarb hydrochloride in spinach were submitted to support the domestic use of Tattoo Fungicide on spinach. In addition, plant metabolism studies on spinach were reassessed in the framework of this petition.

Maximum residue limit

The recommendation for maximum residue limit (MRL) for propamocarb hydrochloride was based upon the submitted field trial data, and the guidance provided in the OECD MRL Calculator. Table A1 summarizes the residue data used to calculate the proposed MRL for spinach.

Table A1 Summary of field trial data used to support MRL
Commodity Application Method/ Total Application Rate (g a.i./ha)Footnote 1 Preharvest Interval (days) Lowest Average Field Trial Residues (ppm) Highest Average Field Trial Residues (ppm)
Spinach Foliar application/ 6522-6894 1-3 28 84

Following the review of all available data, the MRL as proposed in Table 1 is recommended to cover residues of propamocarb hydrochloride. Residues of propamocarb hydrochloride in this crop commodity at the proposed MRL will not pose an unacceptable risk to any segment of the population, including infants, children, adults and seniors.

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